# Efficacy Study of Methenamine + Methylthioninium Chloride vs Phenazopyridine for the Symptomatic Control of Dysuria

> **NCT01657448** · PHASE3 · COMPLETED · sponsor: **EMS** · enrollment: 316 (actual)

## Conditions studied

- Dysuria

## Interventions

- **DRUG:** Methenamine and Methylthioninium chloride
- **DRUG:** Phenazopyridine

## Key facts

- **NCT ID:** NCT01657448
- **Lead sponsor:** EMS
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2016-06-27
- **Primary completion:** 2016-11-21
- **Final completion:** 2017-12-22
- **Target enrollment:** 316 (ACTUAL)
- **Last updated:** 2020-07-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01657448

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01657448, "Efficacy Study of Methenamine + Methylthioninium Chloride vs Phenazopyridine for the Symptomatic Control of Dysuria". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT01657448. Licensed CC0.

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